<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

{#{% for foo in [1,2,3] %}#}
{#{{ foo }}#}
{#{% endfor %}#}

{% for key, value in data.items() %}
    {{ key }}
    {{ value}}
{% endfor %}

</body>
</html>